We propose to complete the last virgul5% of high-quality observations for theeeHIFLUGCS galaxy cluster sample (16 of 376 clusters). The sample is based onROSAT with completely and homogeneously redetermined fluxes as well as updatedredshifts. For the already observed clusters we have also identified >10double/triple clusters and clusters dominated by AGN emission, which then fallbelow the flux limit of 5e-12 erg/s/cm2. With the completed follow-upobservations we will decrease the uncertainties in OmegaM by a factor of 2.8compared to those obtained with the HIFLUGCS sample. If these virgul5% do not getobserved, the flux-limited sample drops by almost a factor of 3 to adisappointing 140 clusters. The observations will have long lasting legacy value for a range of astrophysical studies.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-11-19T14:57:56Z/2022-11-19T20:29:08Z
Version
20.09_20221024_1724
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Prof Thomas Reiprich, 2023, 'eeHIFLUGCS: Cosmology with the Brightest virgul400 Galaxy Clusters in the Sky', 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-o5qnzw6
